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University of Auckland research has helped inform a change in blood-donation policy.
TUESDAY 28 APRIL: Population health researchers are excited to have helped inform a policy change by the New Zealand Blood Service (NZBS).
From 4 May, every blood donor will be asked the same questions about their sexual history, whereas previously, men who have sex with men were excluded (deferred) if they had oral or anal intercourse with another man in the previous three months.
“This is a much fairer system, because no longer will men be singled-out and asked sexuality-based questions about whether they’ve had sex with another man,” says researcher Tony Sriamporn in the School of Population Health at Waipapa Taumata Rau, University of Auckland.
This blanket ban meant men with low or no risk of HIV, such as men in monogamous same-sex relationships, were not allowed to donate.
In 2022, the Sex and Prevention of Transmission Study (SPOTS) recruited 3,253 gay and bisexual men, collected blood samples, and asked them about their HIV prevention behaviours and experience with blood donation.
SPOTS data showed that four out of five gay and bisexual men in New Zealand wanted to donate blood if the rules were changed and they were allowed to donate.
Importantly, the study found no participants with confirmed undiagnosed HIV.
“We knew the New Zealand Blood Service wanted to modernise but lacked New Zealand evidence to strengthen their case. Therefore, we are delighted that SPOTS participants have helped improve New Zealand’s blood donor policy,” says Sriamporn.
The University’s SPOTS study found a policy like the one just announced could triple the number of eligible gay and bisexual men donors from 13 percent to 41 percent or around 5,200 to 16,400 men.
“It’s a win for everyone as we always need more donors,” Sraimporn says. “We saw how recent events like Cyclone Vainau can disrupt collection services and quickly leave us short of blood.
New Zealand Blood Service chief medical officer Dr Sarah Morley says the organisation has long been committed to moving towards a behaviour-based approach when screening potential blood and plasma donors.
“The findings from the SPOTS research provided valuable New Zealand-specific evidence that strengthened the growing international evidence base,” Morley says.
“Together, this enabled our clinical team to complete a detailed review and risk assessment, confirming that introducing behaviour-based screening would not compromise the safety and quality of the blood we supply to patients.
“We’re looking forward to implementing these changes and to adopting a fairer, more consistent approach to assessing donor eligibility.”
Liz Gibbs, chief executive of The Burnett Foundation, also welcomes the move.
“We welcome this as an important step forward towards more equitable, behaviour-based donor screening,” Gibbs says.
“It reflects years of advocacy and the growing recognition that policy must evolve alongside science and community understanding.”
Associate Professor Peter Saxton from the University of Auckland’s School of Population Health says, “Sriamporn’s internationally recognised and published doctoral research offers insights into how an entire population could be introduced into the blood donor pool.
“It’s not every day that an entire population become eligible to donate blood. However, care must be taken in the next few steps to convert those good intentions into presenting for blood donation,” Saxton says.
“While many participants spoke about altruism, doing their civic duty, helping others, a significant minority felt alienated by the previous policy, and weren’t sure whether they would donate,” Saxton says.
“The challenge will be for the blood service rebuild relationships with the gay community, because this will ensure more eligible gay and bisexual men come forward.”
“This is wonderful news for the Rainbow community,” says Sriamporn, but noted that some members will remain frustrated.
“Future research could explore whether people taking pre-exposure prophylaxis (PrEP), preventive HIV medication, could safely donate plasma in NZ,” says Sriamporn.
Australia has introduced a ‘plasma pathway’, which has enabled a wider group of donors to donate plasma, including people who use PrEP.
“We’ll also be closely watching the recent rollout in Australia for how its ‘Plasma Pathway’, which does just that, performs in practice.” Find out more.
Nonetheless, the team supports cautious and safe introduction of a fairer and consistent behaviour-based sexual activity screening approach for all donors.
The Sex and Prevention of Transmission Study (SPOTS) has been led by Waipapa Taumata Rau, University of Auckland in partnership with the University of Otago and community organisations Burnett Foundation Aotearoa, Body Positive Inc, Te Whāriki Takapou and the NZ Blood Service.
The SPOTS study was funded by the Health Research Council of NZ and the Ministry of Health.
Microplastics are having toxic effects on tiny creatures on the seafloor – and the ripple effect could throw the marine environment out of balance, says University of Auckland research fellow Dr Yuxi You.
Her recent research shows a bamboo worm – Macroclymenella stewartensis – is less active and less able to mix sediment in the seabed when exposed to high levels of microplastics.
“When you go to the estuary, you might not see these tiny animals that live beneath the sediment, but you might notice the casting mounds they leave on the mudflats.
“Despite being well hidden, these creatures are vital for the functioning of the ecosystem.
“They help keep our coastal waters clean and able to support marine life,” says You, from the University’s Institute of Marine Science and Centre for Climate, Biodiversity and Society.
When healthy, the bamboo worm and other tiny creatures burrow in the seafloor, allowing oxygenated water to enter deeper into the sediment. This breathes life into the seabed.
The tiny worms eat organic matter, which regulates the levels of carbon and nitrogen in the sediment and surrounding waters.
When the worms deposit small piles of poo on the seabed, this provides nutrients for microscopic plants that live on the sediments and fuels coastal food webs, says You.
“If microplastics stop creatures on the seafloor performing their vital role of keeping the ecosystem in balance, the risk of algal blooms increases.
“Algal blooms can cause the marine environment to become anoxic, and in an environment with no oxygen, fish and other marine life can’t survive,” she says.
University of Auckland Marine Science Professor Simon Thrush, who supervised You’s research, says healthy marine sediments store carbon, acting as a buffer against climate change.
However, when sediments become unbalanced, they can release greenhouse gases, such as nitrous oxide and methane.
Tiny creatures that help keep the seabed healthy are therefore important for the health of the planet, he says.
“Microplastics are affecting the organisms that live in sediment and they’re part of our biodiversity.
“These organisms are hidden heroes that do a lot for us,” says Thrush.
While You’s study at Leigh Marine Laboratory north of Auckland showed the bamboo worms were less active when exposed to microplastics, it isn’t yet clear why.
It’s possible the worms eat plastic particles, absorb chemicals from plastics that leach into sediment, or have less food available because microplastics reduce the growth of the algae they feed on, she says.
Seabirds and eagle rays feed on worms and other tiny creatures in the seabed, so the harmful effects of microplastics can pass up the food chain, says You.
Thrush says the most common source of microplastics is vehicle tyres, while other major sources include polypropylene and polyester fibres from clothing, and polyethylene from plastic bottles and plastic bags.
People can help tackle the microplastic problem by reducing the amount of plastic they buy, picking up plastic rubbish on the beach, supporting harbour clean up groups, and buying clothing made of natural fibres, he says.
While the amount of plastics pouring into the marine environment has increased, recent research shows some microplastics degrade in sediments over time, he says.
Currently, there are no limits set for safe levels of microplastic pollution in New Zealand – and policies will be needed to manage the problem, Thrush says.
Clean coasts are “precious” to New Zealand communities, says You.
“We benefit from nature, so we need to protect it.
“Most people don’t think about small animals living in the seafloor, but they’re of equal importance to larger animals, such as dolphins and penguins, when it comes to keeping ecosystems healthy,” she says.
A law change that would provide legal protections for people seeking help in the event of an overdose could to be debated in Parliament for the first time tomorrow.
The Drug Overdose (Assistance Protection) Legislation Bill, a member’s bill in the name of Green MP Kahurangi Carter, would provide explicit protection for people who are seeking help for themselves or others in the event of an overdose or other ‘drug-related acute adverse reaction’.
The NZ Drug Foundation is welcoming the Bill, which is an example of what is often called an ‘overdose Good Samaritan law' internationally – something the charity has long advocated for.
The Foundation’s Executive Director Sarah Helm says that if passed, the law change will save lives.
“We lose almost three people a week to entirely preventable overdose – and we know that people aren’t seeking help because they fear getting in trouble,” she says.
A survey of people at risk of drug harm conducted by the Drug Foundation in 2025 found that almost 40% of respondents would be worried to call 111 if someone was experiencing an adverse reaction to drugs.
“If passed, this small law change will let us send a clear message that people should get help straight away and that they won’t get in trouble,” says Helm.
Helm points to several coronial findings in recent years that have highlighted witnesses’ hesitancy to call for help as a contributing factor in drug deaths.
“Some of the stories we’ve heard have been heartbreaking. The fact that in so many of these critical moments people are weighing up getting in trouble with the law versus getting help for their friends is just tragic.”
Helm says that she is hopeful Parliament will send the Bill to select committee so that MPs can hear evidence from the public and people who’ve been impacted by overdose while they scrutinise the Bill.
Notes:
At the time of writing, the Drug Overdose (Assistance Protection) Legislation Bill is the fourth members’ order of business on Parliament’s order paper. Subject to other business in the House, the Bill may not be debated until the next Members’ Day, or the first reading debate may be interrupted before a vote is taken.
World Vision’s ethical gift catalogue offers New Zealanders a meaningful way to celebrate mums, while helping families around the world
This Mother’s Day, New Zealanders looking for a meaningful alternative to flowers or chocolates are being encouraged to choose an ethical gift that changes lives.
Gifts from World Vision New Zealand’s Gift Catalogue help deliver practical, life-changing support to millions of mothers and children worldwide facing hunger, displacement, and poverty.
Through the catalogue, shoppers can choose unique and ethical gifts that honour their special mum or mother figure while supporting families living in some of the world’s toughest places.
With prices starting from just $10 (which can provide lifesaving immunisations for a child), the practical and life-changing gifts make it easy for everyone to contribute to a brighter future for vulnerable children and mothers globally.
Popular gifts include fast-growing seeds so families can grow more food ($10); nutrition programmes for mothers and babies ($63); cooking classes to help fight malnutrition ($54); emergency food for children suffering hunger ($60); and support for women to start a business ($160). Larger gifts such as emergency shelter can also help families rebuild after disasters or conflict.
World Vision New Zealand’s National Director, TJ Grant, says Mother’s Day is the perfect opportunity to celebrate the care and compassion mothers show every day.
“Mother’s Day is about recognising the love and sacrifice of mums and mother figures in our lives. Choosing an ethical gift is a powerful way to celebrate that love while extending it to another family who may be facing incredibly difficult circumstances.
“These gifts provide practical support for women and children around the world — whether that’s access to nutritious food, education, healthcare, or the opportunity to earn an income and build a better future.”
Ethical gifts are designed to support both immediate needs and long-term change, helping communities strengthen food security, improve health outcomes, and create opportunities for women and girls.
Each gift comes with the option of a printed card or e-card, allowing the giver to share the story behind the gift with their mum on the day and explain how their present is helping families around the world.
To make a meaningful impact this Mother’s Day, visit the World Vision New Zealand Gift Catalogue at worldvision.org.nz/give-now/smiles-gift.